Blowpipe.



C. HOLDER, Jn. 'BLOWPIPEl A PPLIGATIoN FILED un 24, 1910.

Patented Api 14,1914.

narran srnraslrnran eric.

CHARLES HOLDER, JR., OF NEW YORK,N. Y., ASSIGNOR TO HOLDER WELDING EQUIPMENT CO., A CORPORATION OF NEW YORK.

BLOWPIPE.

incenso.

Specification of Letters Patent.

Patented Apr. 141, 1914.

. To all 'whom t may. concern Be it known that I, CHARLES HOLDER, J r., a citizen of the United States, residing at New York city, in the county of New York and State of New York, have invented new and useful Improvementsgi-n Blowpipes, of which the following is a specification.

This invention relates to blow pipes and its object is to provide a pipe with a head to receive blasts of air and gas or inflammable vapor, the head being adapted to receive a nozzle having an outlet and a proportionately large mixing chamber to r'eceive and mix the gas preparatory to its issuing from the outlet as will be more fully described in the following specification, set forth in the lclaim and illust-rated in the drawings, wherein: l i y vFigure 1 is a side elevation of the blow pipe ,with part in sect-ion. Fig. 2 is a longitudinal sectional view of a modified form of nozzle detached. Fig. 2a is an end view of the nozzle shown in Fig. 2. Fig. 3 is a transverse sectional view of the blow pipe cut on the line-AB of Fig. 1. Fig. 4: is a similar view cut on the line CwD of' Fig. 1. Fig. 5 is a sectional view of a. slightly modified form of head which may be used upon the blow pipe. Fig. 6 is a sectional view of still another modified form of nozzle which may be used upon the blow pipe.

This blow pipeconsist-s lof pipes 10 and 11, the former conducting gas or inflamma- 1 ble vapor to the head 12 and thepipe 11 being provided to supply the interior of the head with air or oxygen. The two pipes are held together by means of a cylinder 13 which also acts as a hand .piece to manipu late the pipe and the pipea 11 is provided with the needle valve 14 while the pipe 10 has a cock 15 to shut ofl' the gas supply. Each pipe has at its end a nipple 16 by which it may be connected with tanks or pumps through the medium of a flexible .tube so that the blow pipe may be carried to any desired point or thrown at any convenient angle to operate it.

The head 12- is recessed and tapped to form a chamber 17 through the center of which depends a nozzle 18 through which* extends the passage 19 for1 the flow of the oxygen and iscontrolled by needle valve 14.l

The gas after entering the head from the pipe 1.0, passes down the chamber around 'the nozzle 18 and meets the 'air or oxygen from the ber 22. y

The nozzle 20 containing the outlet is of any desired size and length and the orifice 21 out of which the mixed gas passes may be of any desired size to provide the neces* sary flame by increasing or decreasing the length of mixing chamber 22 and the diameter of passage 244 according to whether a large or small nozzle is screwed on. A large nozzle will have a llongerfmixing chamber and the diameter of passage 24 will be greater so as to pass more gas while al small nozzle will have a smaller mixing chamber and passage 24 will be of smaller diameter. rlhis mixing chamber 22 into which the air and gas pass from the passage 19 and-'the chamber 17 causes them to combine s'o that they are ready for burning on issuing from the orifice 21. It will be seen that the nozzle in Fig. 2 is slightly longer than that vshown in Fig. l while in Fig. 6 a shorter nozzle -with smaller orifice 21 and mixing chamber is provided so the latter is only large enough to provide for lthe amount of gas furnished through the circular part-'formed by screwing nozzle 20 over nozzle 18 and it is obvious that these nozzles 20may be changed at pleasure when it is necessary to obtain a'larger or smaller flame and this change is effected by providing'the upper end of the nozzle with the redut'ed portion 23 which'is screwed into the Ioulter walls off the chamber 17 which is correspondingly threaded.

Itis obvious that other modifications arid arrangements of the parts may be provided for, without departing from thef-:essential features above described. -f

l/Vhat I claim as new and desire to secure by Letters Patent is:

A blow pipe comprising a head having at one side a chamber and a nozzle centrally positionedv therein with its discharge end terminating short of a plane in which the edge. ofthe chamber lies, a gas pipe communi'cating with said chamber at the inner end thereof, an air pipe connected to the head at the receiving end of the nozzle, and a detachable nozzle connected to the head and having an end portion extending into the chamber and terminatingA short of the communication between the lirst mentioned pipe and the chamber, the said end portion of the detachable nozzle receiving and being passage 19 and is mixed in chamilol spaced from the discharge end of` the 'rstanentioned nozzle, said nozzles having alined bores, the bore in the detachable nozzle being of three different diameters with the section thereof of smallest diameter located ,at its discharge end, the

next largest section located at the delivery endof the first mentioned nozzle and the section of .the bore of largest diameter located in the vchamber of the head, the in-.

termediate. bore of the detachable nozzle loe-y ing of greater diameter than the bore of the first mentioned nozzle. y

In testimony whereof I affix' my signature in presence of two Witnesses. CHARLES HOLDER, JB.

Witnesses: l

JAMES F. DUHAMEL GEO. A. SENIOR. 

